For some days you have noticed that chatting on WhatsApp By typing with the phone keypad, not only have you lost all the words stored in the past but the mobile device does not save the new words you enter. Well yes Android keyboard no longer stores words on WhatsApp and then on the keyboard dictionary.
Are you sure you haven't changed your phone settings? Did you check them well?
You need to know that in the Applications installed on Android there are some commands like Delete Data e Clear Cache. These commands are useful to use when the installed app no longer works or has reached cache limits. Therefore?
To solve the problem, for a Samsung smartphone, the Android keyboard that no longer stores words on WhatsApp and other applications, you will have to intervene on the phone keypad in order to unlock the dictionary. Like?
Go to Settings> Applications (Application Manager)> All> Samsung keyboard> Clear Data and Clear Cache, and you will see that your keyboard will be operational again.
Go back to WhatsApp and try to type any word. Exit the chat, re-enter and you will see that the typed word will be saved by the keyboard on your Android device automatically.
If this does not work the first time, repeat the operation several times.